CN204302738U - Based on DSP digital-control constant-flow source circuit - Google Patents
Based on DSP digital-control constant-flow source circuit Download PDFInfo
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- CN204302738U CN204302738U CN201420869120.0U CN201420869120U CN204302738U CN 204302738 U CN204302738 U CN 204302738U CN 201420869120 U CN201420869120 U CN 201420869120U CN 204302738 U CN204302738 U CN 204302738U
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- source circuit
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Abstract
The utility model discloses based on DSP digital-control constant-flow source circuit, comprise DSP microcontroller, keyboard, DC/DC transducer, constant-current source circuit, current output circuit, ADC change-over circuit, the output terminal of described DSP microcontroller connects the input end of DC/DC transducer, the output terminal of DC/DC transducer connects the input end of constant-current source circuit, the output terminal of constant-current source circuit connects the input end of current output circuit and ADC change-over circuit respectively, the output terminal of ADC change-over circuit connects the input end of DSP microcontroller, and described keyboard connects the input end of DSP microcontroller.The utility model has fast response time, constant current accuracy is high, output current range of adjustment large, energy long-term stable operation.
Description
Technical field
The utility model relates to a kind of constant-current source circuit, is specifically related to based on DSP digital-control constant-flow source circuit.
Background technology
Constant current source is that a kind of extraneous electric network source produces fluctuation or electric network impedance characteristic changes, and still can keep constant current source by output current.Mainly for detection of electrothermal relay, breaker of plastic casing, small-sized short-circuiting device and need production occasion such as setting rated current, action current, short circuit current protection etc., there is important actual application value.Traditional constant current source general operational amplifier and triode again form, but device is comparatively large by the impact of temperature, adds the existence of local nonlinearity, defeated not out of stable constant current source.So adopt full-bridge rectification to add capacitor filtering output constant current source, can meet the transient response of electric current preferably, but can not meet the requirement of big current, and precision is lower, power consumption is higher.Therefore, R & D design goes out one and has real-time follow-up effect, exports high precision numerical control constant current, has important practical significance.
Utility model content
The technical problems to be solved in the utility model be to provide have that fast response time, constant current accuracy are high, output current range of adjustment large, can long-term stable operation based on DSP digital-control constant-flow source circuit.
Based on DSP digital-control constant-flow source circuit, comprise DSP microcontroller, keyboard, DC/DC transducer, constant-current source circuit, current output circuit, ADC change-over circuit, the output terminal of described DSP microcontroller connects the input end of DC/DC transducer, the output terminal of DC/DC transducer connects the input end of constant-current source circuit, the output terminal of constant-current source circuit connects the input end of current output circuit and ADC change-over circuit respectively, the output terminal of ADC change-over circuit connects the input end of DSP microcontroller, and described keyboard connects the input end of DSP microcontroller.
Further, described DSP microcontroller output is also connected with display unit.
Further, described display unit comprises light-emitting diode display and LED display lamp.
Further, also operational amplifier is connected with between described constant-current source circuit and ADC change-over circuit.
Further, described DSP microcontroller is also connected with crystal oscillator reset circuit, for DSP microcontroller provides concussion source, and when DSP microcontroller is made mistakes, carries out reset operation.
The beneficial effects of the utility model are: the output current that the utility model is arranged by keyboard, data are sent into liquid crystal display display current set value by DSP microcontroller, data are sent into DC/DC transducer simultaneously, the voltage that DC/DC transducer exports as the control signal of Numerical Controlled Current Source output current, and then exports numerical control adjustable DC constant current source; This signal is converted to digital signal by ADC, and these data are read in internal data memory by DSP microcontroller, by the feedback element of digital quantity form, makes electric current more stable, then sends into LED display, sees predetermined value and output valve by display.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the utility model based on DSP digital-control constant-flow source circuit.
Embodiment
Accompanying drawing discloses concrete structure of the present utility model without limitation, and below in conjunction with accompanying drawing, the utility model will be further described.
As shown in Figure 1, based on DSP digital-control constant-flow source circuit, comprise DSP microcontroller, keyboard, DC/DC transducer, constant-current source circuit, current output circuit, ADC change-over circuit, the output terminal of described DSP microcontroller connects the input end of DC/DC transducer, the output terminal of DC/DC transducer connects the input end of constant-current source circuit, the output terminal of constant-current source circuit connects the input end of current output circuit and ADC change-over circuit respectively, the output terminal of ADC change-over circuit connects the input end of DSP microcontroller, and described keyboard connects the input end of DSP microcontroller.Described DSP microcontroller output is also connected with display unit.Described display unit comprises light-emitting diode display and LED display lamp.Also operational amplifier is connected with between described constant-current source circuit and ADC change-over circuit.Described DSP microcontroller is also connected with crystal oscillator reset circuit.
Claims (5)
1. based on DSP digital-control constant-flow source circuit, comprise DSP microcontroller, keyboard, DC/DC transducer, constant-current source circuit, current output circuit, ADC change-over circuit, it is characterized in that: the output terminal of described DSP microcontroller connects the input end of DC/DC transducer, the output terminal of DC/DC transducer connects the input end of constant-current source circuit, the output terminal of constant-current source circuit connects the input end of current output circuit and ADC change-over circuit respectively, the output terminal of ADC change-over circuit connects the input end of DSP microcontroller, and described keyboard connects the input end of DSP microcontroller.
2. according to claim 1 based on DSP digital-control constant-flow source circuit, it is characterized in that: described DSP microcontroller output is also connected with display unit.
3. according to claim 2 based on DSP digital-control constant-flow source circuit, it is characterized in that: described display unit comprises light-emitting diode display and LED display lamp.
4. according to claim 1 based on DSP digital-control constant-flow source circuit, it is characterized in that: between described constant-current source circuit and ADC change-over circuit, be also connected with operational amplifier.
5. according to claim 1 based on DSP digital-control constant-flow source circuit, it is characterized in that: described DSP microcontroller is also connected with crystal oscillator reset circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420869120.0U CN204302738U (en) | 2014-12-31 | 2014-12-31 | Based on DSP digital-control constant-flow source circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420869120.0U CN204302738U (en) | 2014-12-31 | 2014-12-31 | Based on DSP digital-control constant-flow source circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204302738U true CN204302738U (en) | 2015-04-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420869120.0U Expired - Fee Related CN204302738U (en) | 2014-12-31 | 2014-12-31 | Based on DSP digital-control constant-flow source circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204302738U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104503337A (en) * | 2014-12-31 | 2015-04-08 | 桂林铭瑶电子科技有限公司 | Numerically controlled constant current source circuit based on DSP |
-
2014
- 2014-12-31 CN CN201420869120.0U patent/CN204302738U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104503337A (en) * | 2014-12-31 | 2015-04-08 | 桂林铭瑶电子科技有限公司 | Numerically controlled constant current source circuit based on DSP |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150429 Termination date: 20151231 |
|
| EXPY | Termination of patent right or utility model |